Gaya APA

SUDARWATI, M., Grace, E. (2009). LOOK AHEAD AN ENGLISH COURSE FOR SENIOR HIGH SCHOOL STUDENTS YEAR XI SCIENCE AND SOCIAL STUDY PROGRAM . Jakarta: Erlangga.

Gaya MLA

SUDARWATI, M.., Grace, Eudia. "LOOK AHEAD AN ENGLISH COURSE FOR SENIOR HIGH SCHOOL STUDENTS YEAR XI SCIENCE AND SOCIAL STUDY PROGRAM". Jakarta: Erlangga, 2009. Textbook.